Refer to the exhibit. A QoS strategy has already been deployed on the LAN. Choose three WAN QoS best practices that should be used over the WAN link. (Choose three.)

A.
Implement NBAR.

B.
Implement admission control.

C.
Mark voice traffic as EF in DSCP.

D.
Mark voice traffic highest priority in 802.1p.

E.
Use cRTP to maximize bandwidth utilization.

F.
Configure access switches to trust traffic from IP phones.